President Barack Obama signs the John M. Roll United States Courthouse Bill in Washington

From left, Rep. Jeff Flake (R-AZ), Secretary of Homeland Security Janet A. Napolitano, Senator John McCain (R-AZ), Pia Carusone, chief of staff for Rep. Gabrielle Giffords (D-AZ), Rep. Ed Pastor (D-AZ), and Rep. Trent Franks (R-AZ) listen as President Barack Obama speaks before signing the John M. Roll United States Courthouse Bill in the Oval Office of the White House, February 17, 2011 in Washington. President Obama signed the bill which names a federal courthouse in Yuma, Arizona after Judge John Roll who was a federal judge killed along with 18 others by Jared Loughner during a shooting in Tucson. UPI/Brendan Smialowski/Pool